byLawrence, George H. M. (George Hill Mathewson), 1910-1978
101 p., ill., 24 cm. Edited by George H.M. Lawrence. Lectures delivered at a Bicentennial symposium conducted by the Pennsylvania Horticultural Society in 1976. Topics: Gardens--United States--History., Horticulture--United States--History., American Revolution...
119 p., 1 folded map, ill., 24 cm. Includes catalog of a bicentennial exhibit of books, chiefly from the library of the Pennsylvania Horticultural Society. Limited, numbered edition of 250. Topics: Pennsylvania Horticultural Society., Horticultural...